Bump urllib3 from 1.25.10 to 1.26.19 in /capstone/files/app

Bumps [urllib3](https://github.com/urllib3/urllib3) from 1.25.10 to 1.26.19.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/1.26.19/CHANGES.rst)
- [Commits](urllib3/urllib3@1.25.10...1.26.19)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

capstone/files/app/requirements-dev.txt

@@ -22,7 +22,7 @@ requests==2.24.0
 six==1.15.0
 starlette==0.13.6
 toml==0.10.1
-urllib3==1.25.10
+urllib3==1.26.19
 uvicorn==0.11.8
 uvloop==0.14.0
 websockets==8.1